reflectance value

Rather than estimating the BRDF function or any parameters in a reflectance model, Singular Value Decomposition ( SVD) is used to estimate a low dimensional approximation of the image set of a Lambertian object under both changing of illumination and geometrical pose.

所提出的方法不是直接去估计对象反射模型中的参数，或是去拟合BRDF函数，而是用奇异值分解（SVD）来拟合Lambertian对象在光照和几何朝向变化情况下的所有图像集合。

According to related national standards with contamination resistance and artificial weathering, the sample was tested and the pre-and post value of solar reflectance and hemispherical emittance was measured.

依据相关国家标准对样品进行耐沾污试验与人工气候老化加速试验，测试老化与沾污前后样品半球发射率与太阳反射比的变化。

The asphalt reflectance ( BRo) shows that formation of the asphalt was hardly affected by thermal action. Practically, the Silurian asphaltic sandstones were formed mainly by intense bio degradation and the BRo value reflects the bio degradation grade of the asphalt.

沥青反射率BRo反映了沥青的形成受热作用影响不大，BRo大小实际上反映生物降解程度的强弱，志留系沥青砂岩主要是由较强烈的生物降解作用而造成的。

With the condition of table 4.3, with increasing of temperature the average reflectance value decreases and the minimum reflectance point moves towards red direction.

随着温度的增加薄膜的平均反射率降低并且反射低谷向长波方向移动；